[115] See Part I. p. 161.

[116] "Der menschliche Wille," p. 13.

[117] On the Motions of the Tendrils of Plants; among the essays of Knight published under the title, "A Selection from Physiological and Horticultural Papers," 1841.

[118] See "Insectivorous Plants," Chaps. I. and II.

[119] "The Movements of Plants," Chap. III.

[120] See experiments made by Eimer: "Entstehung der Arten," etc., p. 263 et seq.

[121] E. Pflüger: "Die sensorischen Functionen des Rückenmarks der Wirbelthiere," 1853.

[122] See Lange: "Geschichte des Materialismus," II. Theil, p. 486.

[123] "The Science of Ethics," p. 60.

[124] "Der thierische Wille," p. 161.